GM Service Manual Online
For 1990-2009 cars only

These vehicle accessories can be used for up to 10 minutes after the engine is turned off:

    • Audio System
    • Power Windows

These features will work when the ignition key is in ON/RUN or ACC/ACCESSORY. Once the key is turned from ON/RUN to LOCK/OFF, power to the radio will continue to work 10 minutes or until the driver door is opened. The power windows will continue to work for up to 10 minutes or until any door is opened.